code: def ddf_left(df_left):
      # Create frame with 10 partitions
      # Skip division on 2 so there is one mismatch with ddf_right
      return dd.repartition(
          df_left, [0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 11]
      )
  
imports: from __future__ import annotations
  import numpy
  import pandas
  import pytest
  import dask.dataframe
  from dask.dataframe._compat import PANDAS_GE_210
  from dask.dataframe.utils import assert_eq
label_desc: Use image node_id 3 for calling a global function with example usage: ddf_left(df_left) and returns: dd